Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 200-756-3 | CAS number: 71-55-6
Hydrolysis
Administrative data
Link to relevant study record(s)
Description of key information
No specific abiotic hydrolysis studies are available for submission. Vogel and McCarty 1986 (the research paper is included in the biodegradation section of the dossier) while evaluating the ability of anaerobic bacteria to degrade 1,1,1-trichloroethane quote the abiotic hydrolysis to the approximately nine years. The abiotic degradation route is as follows:
1,1,1-Trichloroethane -> 1.1-dichloroethylene + acetic acid -> vinyl chloride -> carbon dioxide.
Key value for chemical safety assessment
Additional information
In the 1996 UK review it is noted that the material is fairly resistant to abiotic hydrolysis with half lives estimated in months rather than days. Contamination of the surface and marine waters is most likely to occur from waste water disposal following use in industrial processes such as metal cleaning. Similarly, contamination of groundwater is thought to occur following leaching from existing unregulated chemical disposal sites. Contamination of water is therefore considered unlikely when used as a transported intermediate as no release should occur. The UK review provides an estimate of the air:water partition coefficient (Kaw) of -0.03 to -0.17 supported by the fact that volatility from a I.0 Molar solution in 30 minutes is 6.1. This indicates that abiotic hydrolysis will be of negligible importance in the removal of this material from the environment.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
